/*
 * Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
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 *
 *
 */

package com.sun.java.swing.plaf.motif;

import sun.awt.AppContext;

import javax.swing.*;
import javax.swing.border.*;
import javax.swing.plaf.basic.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.plaf.*;

/**
 * MotifButton implementation
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases.  The current serialization support is appropriate
 * for short term storage or RMI between applications running the same
 * version of Swing.  A future release of Swing will provide support for
 * long term persistence.
 *
 * @author Rich Schiavi
 */
public class MotifButtonUI extends BasicButtonUI {

  protected Color selectColor;

  private boolean defaults_initialized = false;

  private static final Object MOTIF_BUTTON_UI_KEY = new Object();

  // ********************************
  //          Create PLAF
  // ********************************
  public static ComponentUI createUI(JComponent c) {
    AppContext appContext = AppContext.getAppContext();
    MotifButtonUI motifButtonUI =
        (MotifButtonUI) appContext.get(MOTIF_BUTTON_UI_KEY);
    if (motifButtonUI == null) {
      motifButtonUI = new MotifButtonUI();
      appContext.put(MOTIF_BUTTON_UI_KEY, motifButtonUI);
    }
    return motifButtonUI;
  }

  // ********************************
  //         Create Listeners
  // ********************************
  protected BasicButtonListener createButtonListener(AbstractButton b) {
    return new MotifButtonListener(b);
  }

  // ********************************
  //          Install Defaults
  // ********************************
  public void installDefaults(AbstractButton b) {
    super.installDefaults(b);
    if (!defaults_initialized) {
      selectColor = UIManager.getColor(getPropertyPrefix() + "select");
      defaults_initialized = true;
    }
    LookAndFeel.installProperty(b, "opaque", Boolean.FALSE);
  }

  protected void uninstallDefaults(AbstractButton b) {
    super.uninstallDefaults(b);
    defaults_initialized = false;
  }

  // ********************************
  //          Default Accessors
  // ********************************

  protected Color getSelectColor() {
    return selectColor;
  }

  // ********************************
  //          Paint Methods
  // ********************************
  public void paint(Graphics g, JComponent c) {
    fillContentArea(g, (AbstractButton) c, c.getBackground());
    super.paint(g, c);
  }

  // Overridden to ensure we don't paint icon over button borders.
  protected void paintIcon(Graphics g, JComponent c, Rectangle iconRect) {
    Shape oldClip = g.getClip();
    Rectangle newClip =
        AbstractBorder.getInteriorRectangle(c, c.getBorder(), 0, 0,
            c.getWidth(), c.getHeight());

    Rectangle r = oldClip.getBounds();
    newClip =
        SwingUtilities.computeIntersection(r.x, r.y, r.width, r.height,
            newClip);
    g.setClip(newClip);
    super.paintIcon(g, c, iconRect);
    g.setClip(oldClip);
  }

  protected void paintFocus(Graphics g, AbstractButton b, Rectangle viewRect, Rectangle textRect,
      Rectangle iconRect) {
    // focus painting is handled by the border
  }

  protected void paintButtonPressed(Graphics g, AbstractButton b) {

    fillContentArea(g, b, selectColor);

  }

  protected void fillContentArea(Graphics g, AbstractButton b, Color fillColor) {

    if (b.isContentAreaFilled()) {
      Insets margin = b.getMargin();
      Insets insets = b.getInsets();
      Dimension size = b.getSize();
      g.setColor(fillColor);
      g.fillRect(insets.left - margin.left,
          insets.top - margin.top,
          size.width - (insets.left - margin.left) - (insets.right - margin.right),
          size.height - (insets.top - margin.top) - (insets.bottom - margin.bottom));
    }
  }
}
